a pair of gills
a single circulatory system
or
an gas canister full of breathing gas - not pure oxygen, as this becomes toxic under high pressures.
goggles to see properly
vigilance against sharks and other possible predators.
xD
They need to adapt to high pressure in the (low part of the ocean) deep ocean.
No, you most definitely do not need to live by the ocean to apply for a marine biologist job. It would be a hassle if you are required to work with the ocean on a daily basis, but you are not forced to live by the ocean.
A seahorse is a fish. It requires ocean water to live.
starfish
They live anywhere where their family is. It's called a pod.
An ocean habitat and food.
A starfish is a salt water animal that lives in every ocean found on the Earth. A starfish has saltwater in place of blood. That is why they need to live in the ocean's.
Yes, they live in the ocean. I have been bitten once. When they are together there is no need to be frightened but when they are alone it means that they have been kicked out of their swan and that they will attack..
That would be the ocean ... or if you need more detail then that the pacific ocean.
The Atlantic Ocean is where they live.
because they need the sunlight
tropical and subtropical regions of the ocean